Headset



FIG. 1 is a front, left side perspective view of a headset showing the new design;

FIG. 2 is a left side elevation view thereof, with the opposite side being identical;

FIG. 3 is a front elevation view thereof; and,

FIG. 4 is a rear elevation view thereof.

The portions of the design shown in broken lines show unclaimed subject matter. 

CLAIM The ornamental design for a headset, as shown and described. 